/**
 ******************************************************************************
 * @file    stm32f30x_gpio.c
 * @author  MCD Application Team
 * @version V1.0.1
 * @date    23-October-2012
 * @brief   This file provides firmware functions to manage the following 
 *          functionalities of the GPIO peripheral:
 *           + Initialization and Configuration functions
 *           + GPIO Read and Write functions
 *           + GPIO Alternate functions configuration functions
 *
 *  @verbatim


 ===============================================================================
 ##### How to use this driver #####
 ===============================================================================
 [..]
 (#) Enable the GPIO AHB clock using RCC_AHBPeriphClockCmd()
 (#) Configure the GPIO pin(s) using GPIO_Init()
 Four possible configuration are available for each pin:
 (++) Input: Floating, Pull-up, Pull-down.
 (++) Output: Push-Pull (Pull-up, Pull-down or no Pull),
 Open Drain (Pull-up, Pull-down or no Pull).
 In output mode, the speed is configurable: Low, Medium, Fast or High.
 (++) Alternate Function: Push-Pull (Pull-up, Pull-down or no Pull), 
 Open Drain (Pull-up, Pull-down or no Pull).
 (++) Analog: required mode when a pin is to be used as ADC channel,
 DAC output or comparator input.
 (#) Peripherals alternate function:
 (++) For ADC, DAC and comparators, configure the desired pin in 
 analog mode using GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AN
 (++) For other peripherals (TIM, USART...):
 (+++) Connect the pin to the desired peripherals' Alternate 
 Function (AF) using GPIO_PinAFConfig() function.
 (+++) Configure the desired pin in alternate function mode using
 GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF
 (+++) Select the type, pull-up/pull-down and output speed via 
 GPIO_PuPd, GPIO_OType and GPIO_Speed members.
 (+++) Call GPIO_Init() function.
 (#) To get the level of a pin configured in input mode use GPIO_ReadInputDataBit()
 (#) To set/reset the level of a pin configured in output mode use
 GPIO_SetBits()/GPIO_ResetBits()
 (#) During and just after reset, the alternate functions are not active 
 and the GPIO pins are configured in input floating mode (except JTAG pins).
 (#) The LSE oscillator pins OSC32_IN and OSC32_OUT can be used as 
 general-purpose (PC14 and PC15, respectively) when the LSE
 oscillator is off. The LSE has priority over the GPIO function.
 (#) The HSE oscillator pins OSC_IN/OSC_OUT can be used as general-purpose 
 (PF0 and PF1 respectively) when the HSE oscillator is off. The HSE has 
 the priority over the GPIO function.  

 @endverbatim

 ******************************************************************************
 * @attention
 *
 * <h2><center>&copy; COPYRIGHT 2012 STMicroelectronics</center></h2>
 *
 * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
 * You may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *        http://www.st.com/software_license_agreement_liberty_v2
 *
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an "AS IS" BASIS, 
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 ******************************************************************************
 */

/* Includes ------------------------------------------------------------------*/
#include "stm32f30x_gpio.h"
#include "stm32f30x_rcc.h"

/** @addtogroup STM32F30x_StdPeriph_Driver
 * @{
 */

/** @defgroup GPIO 
 * @brief GPIO driver modules
 * @{
 */

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

/** @defgroup GPIO_Private_Functions 
 * @{
 */

/** @defgroup GPIO_Group1 Initialization and Configuration
 *  @brief   Initialization and Configuration
 *
 @verbatim
 ===============================================================================
 ##### Initialization and Configuration #####
 ===============================================================================

 @endverbatim
 * @{
 */

/**
 * @brief  Deinitializes the GPIOx peripheral registers to their default reset 
 *         values.
 * @param  GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
 * @retval None
 */
void GPIO_DeInit(GPIO_TypeDef* GPIOx) {
	/* Check the parameters */
	assert_param(IS_GPIO_ALL_PERIPH(GPIOx));

	if (GPIOx == GPIOA) {
		RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOA, ENABLE);
		RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOA, DISABLE);
	} else if (GPIOx == GPIOB) {
		RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOB, ENABLE);
		RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOB, DISABLE);
	} else if (GPIOx == GPIOC) {
		RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOC, ENABLE);
		RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOC, DISABLE);
	} else if (GPIOx == GPIOD) {
		RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOD, ENABLE);
		RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOD, DISABLE);
	} else if (GPIOx == GPIOE) {
		RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOE, ENABLE);
		RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOE, DISABLE);
	} else {
		if (GPIOx == GPIOF) {
			RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOF, ENABLE);
			RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOF, DISABLE);
		}
	}
}

// [ILG]
#if defined ( __GNUC__ )
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wconversion"
#endif

/**
 * @brief  Initializes the GPIOx peripheral according to the specified 
 *         parameters in the GPIO_InitStruct.
 * @param  GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
 * @param  GPIO_InitStruct: pointer to a GPIO_InitTypeDef structure that 
 *         contains the configuration information for the specified GPIO
 *         peripheral.
 * @note   GPIO_Pin: selects the pin to be configured:
 *         GPIO_Pin_0->GPIO_Pin_15 for GPIOA, GPIOB, GPIOC, GPIOD and GPIOE;
 *         GPIO_Pin_0->GPIO_Pin_2, GPIO_Pin_4, GPIO_Pin_6, GPIO_Pin_9 
 *                       and GPIO_Pin_10 for GPIOF.
 * @retval None
 */
void GPIO_Init(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* GPIO_InitStruct) {
	uint32_t pinpos = 0x00, pos = 0x00, currentpin = 0x00;

	/* Check the parameters */
	assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
	assert_param(IS_GPIO_PIN(GPIO_InitStruct->GPIO_Pin));
	assert_param(IS_GPIO_MODE(GPIO_InitStruct->GPIO_Mode));
	assert_param(IS_GPIO_PUPD(GPIO_InitStruct->GPIO_PuPd));

	/*-------------------------- Configure the port pins -----------------------*/
	/*-- GPIO Mode Configuration --*/
	for (pinpos = 0x00; pinpos < 0x10; pinpos++) {
		pos = ((uint32_t) 0x01) << pinpos;

		/* Get the port pins position */
		currentpin = (GPIO_InitStruct->GPIO_Pin) & pos;

		if (currentpin == pos) {
			if ((GPIO_InitStruct->GPIO_Mode == GPIO_Mode_OUT)
					|| (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_AF)) {
				/* Check Speed mode parameters */
				assert_param(IS_GPIO_SPEED(GPIO_InitStruct->GPIO_Speed));

				/* Speed mode configuration */
				GPIOx->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEEDR0 << (pinpos * 2));
				GPIOx->OSPEEDR |= ((uint32_t) (GPIO_InitStruct->GPIO_Speed)
						<< (pinpos * 2));

				/* Check Output mode parameters */
				assert_param(IS_GPIO_OTYPE(GPIO_InitStruct->GPIO_OType));

				/* Output mode configuration */
				GPIOx->OTYPER &= ~((GPIO_OTYPER_OT_0) << ((uint16_t) pinpos));
				GPIOx->OTYPER |=
						(uint16_t) (((uint16_t) GPIO_InitStruct->GPIO_OType)
								<< ((uint16_t) pinpos));
			}

			GPIOx->MODER &= ~(GPIO_MODER_MODER0 << (pinpos * 2));

			GPIOx->MODER |= (((uint32_t) GPIO_InitStruct->GPIO_Mode)
					<< (pinpos * 2));

			/* Pull-up Pull down resistor configuration */
			GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << ((uint16_t) pinpos * 2));
			GPIOx->PUPDR |= (((uint32_t) GPIO_InitStruct->GPIO_PuPd)
					<< (pinpos * 2));
		}
	}
}

// [ILG]
#if defined ( __GNUC__ )
#pragma GCC diagnostic pop
#endif

/**
 * @brief  Fills each GPIO_InitStruct member with its default value.
 * @param  GPIO_InitStruct: pointer to a GPIO_InitTypeDef structure which will 
 *         be initialized.
 * @retval None
 */
void GPIO_StructInit(GPIO_InitTypeDef* GPIO_InitStruct) {
	/* Reset GPIO init structure parameters values */
	GPIO_InitStruct->GPIO_Pin = GPIO_Pin_All;
	GPIO_InitStruct->GPIO_Mode = GPIO_Mode_IN;
	GPIO_InitStruct->GPIO_Speed = GPIO_Speed_2MHz;
	GPIO_InitStruct->GPIO_OType = GPIO_OType_PP;
	GPIO_InitStruct->GPIO_PuPd = GPIO_PuPd_NOPULL;
}

/**
 * @brief  Locks GPIO Pins configuration registers.
 *         The locked registers are GPIOx_MODER, GPIOx_OTYPER, GPIOx_OSPEEDR,
 *         GPIOx_PUPDR, GPIOx_AFRL and GPIOx_AFRH.
 * @note   The configuration of the locked GPIO pins can no longer be modified
 *         until the next reset.
 * @param  GPIOx: where x can be (A or B or D) to select the GPIO peripheral.
 * @param  GPIO_Pin: specifies the port bit to be written.
 *   This parameter can be any combination of GPIO_Pin_x where x can be (0..15).
 * @retval None
 */
void GPIO_PinLockConfig(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) {
	uint32_t tmp = 0x00010000;

	/* Check the parameters */
	assert_param(IS_GPIO_LIST_PERIPH(GPIOx));
	assert_param(IS_GPIO_PIN(GPIO_Pin));

	tmp |= GPIO_Pin;
	/* Set LCKK bit */
	GPIOx->LCKR = tmp;
	/* Reset LCKK bit */
	GPIOx->LCKR = GPIO_Pin;
	/* Set LCKK bit */
	GPIOx->LCKR = tmp;
	/* Read LCKK bit */
	tmp = GPIOx->LCKR;
	/* Read LCKK bit */
	tmp = GPIOx->LCKR;
}

/**
 * @}
 */

/** @defgroup GPIO_Group2 GPIO Read and Write
 *  @brief    GPIO Read and Write
 *
 @verbatim
 ===============================================================================
 ##### GPIO Read and Write #####
 ===============================================================================  

 @endverbatim
 * @{
 */

/**
 * @brief  Reads the specified input port pin.
 * @param  GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
 * @param  GPIO_Pin: specifies the port bit to read.
 * @note   This parameter can be GPIO_Pin_x where x can be :
 *         (0..15) for GPIOA, GPIOB, GPIOC, GPIOD or GPIOE;
 *         (0..2, 4, 6, 9..10) for GPIOF.
 * @retval The input port pin value.
 */
uint8_t GPIO_ReadInputDataBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) {
	uint8_t bitstatus = 0x00;

	/* Check the parameters */
	assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
	assert_param(IS_GET_GPIO_PIN(GPIO_Pin));

	if ((GPIOx->IDR & GPIO_Pin) != (uint32_t) Bit_RESET) {
		bitstatus = (uint8_t) Bit_SET;
	} else {
		bitstatus = (uint8_t) Bit_RESET;
	}
	return bitstatus;
}

/**
 * @brief  Reads the specified input port pin.
 * @param  GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
 * @retval The input port pin value.
 */
uint16_t GPIO_ReadInputData(GPIO_TypeDef* GPIOx) {
	/* Check the parameters */
	assert_param(IS_GPIO_ALL_PERIPH(GPIOx));

	return ((uint16_t) GPIOx->IDR);
}

/**
 * @brief  Reads the specified output data port bit.
 * @param  GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
 * @param  GPIO_Pin: Specifies the port bit to read.
 * @note   This parameter can be GPIO_Pin_x where x can be :
 *         (0..15) for GPIOA, GPIOB, GPIOC, GPIOD or GPIOE;
 *         (0..2, 4, 6, 9..10) for GPIOF.
 * @retval The output port pin value.
 */
uint8_t GPIO_ReadOutputDataBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) {
	uint8_t bitstatus = 0x00;

	/* Check the parameters */
	assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
	assert_param(IS_GET_GPIO_PIN(GPIO_Pin));

	if ((GPIOx->ODR & GPIO_Pin) != (uint32_t) Bit_RESET) {
		bitstatus = (uint8_t) Bit_SET;
	} else {
		bitstatus = (uint8_t) Bit_RESET;
	}
	return bitstatus;
}

/**
 * @brief  Reads the specified GPIO output data port.
 * @param  GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
 * @retval GPIO output data port value.
 */
uint16_t GPIO_ReadOutputData(GPIO_TypeDef* GPIOx) {
	/* Check the parameters */
	assert_param(IS_GPIO_ALL_PERIPH(GPIOx));

	return ((uint16_t) GPIOx->ODR);
}

/**
 * @brief  Sets the selected data port bits.
 * @param  GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
 * @param  GPIO_Pin: specifies the port bits to be written.
 * @note   This parameter can be GPIO_Pin_x where x can be :
 *         (0..15) for GPIOA, GPIOB, GPIOC, GPIOD or GPIOE;
 *         (0..2, 4, 6, 9..10) for GPIOF.
 * @retval None
 */
void GPIO_SetBits(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) {
	/* Check the parameters */
	assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
	assert_param(IS_GPIO_PIN(GPIO_Pin));

	GPIOx->BSRR = GPIO_Pin;
}

/**
 * @brief  Clears the selected data port bits.
 * @param  GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
 * @param  GPIO_Pin: specifies the port bits to be written.
 * @note   This parameter can be GPIO_Pin_x where x can be :
 *         (0..15) for GPIOA, GPIOB, GPIOC, GPIOD or GPIOE;
 *         (0..2, 4, 6, 9..10) for GPIOF.
 * @retval None
 */
void GPIO_ResetBits(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin) {
	/* Check the parameters */
	assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
	assert_param(IS_GPIO_PIN(GPIO_Pin));

	GPIOx->BRR = GPIO_Pin;
}

/**
 * @brief  Sets or clears the selected data port bit.
 * @param  GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
 * @param  GPIO_Pin: specifies the port bit to be written.
 * @note   This parameter can be GPIO_Pin_x where x can be :
 *         (0..15) for GPIOA, GPIOB, GPIOC, GPIOD or GPIOE;
 *         (0..2, 4, 6, 9..10) for GPIOF.
 * @param  BitVal: specifies the value to be written to the selected bit.
 *   This parameter can be one of the BitAction enumeration values:
 *     @arg Bit_RESET: to clear the port pin
 *     @arg Bit_SET: to set the port pin
 * @retval None
 */
void GPIO_WriteBit(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin, BitAction BitVal) {
	/* Check the parameters */
	assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
	assert_param(IS_GET_GPIO_PIN(GPIO_Pin));
	assert_param(IS_GPIO_BIT_ACTION(BitVal));

	if (BitVal != Bit_RESET) {
		GPIOx->BSRR = GPIO_Pin;
	} else {
		GPIOx->BRR = GPIO_Pin;
	}
}

/**
 * @brief  Writes data to the specified GPIO data port.
 * @param  GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
 * @param  PortVal: specifies the value to be written to the port output data 
 *                  register.
 * @retval None
 */
void GPIO_Write(GPIO_TypeDef* GPIOx, uint16_t PortVal) {
	/* Check the parameters */
	assert_param(IS_GPIO_ALL_PERIPH(GPIOx));

	GPIOx->ODR = PortVal;
}

/**
 * @}
 */

/** @defgroup GPIO_Group3 GPIO Alternate functions configuration functions
 *  @brief   GPIO Alternate functions configuration functions
 *
 @verbatim
 ===============================================================================
 ##### GPIO Alternate functions configuration functions #####
 ===============================================================================

 @endverbatim
 * @{
 */

/**
 * @brief  Writes data to the specified GPIO data port.
 * @param  GPIOx: where x can be (A, B, C, D, E or F) to select the GPIO peripheral.
 * @param  GPIO_PinSource: specifies the pin for the Alternate function.
 *   This parameter can be GPIO_PinSourcex where x can be (0..15).
 * @param  GPIO_AF: selects the pin to be used as Alternate function.  
 *   This parameter can be one of the following value:
 *     @arg GPIO_AF_0:  JTCK-SWCLK, JTDI, JTDO/TRACESW0, JTMS-SWDAT, MCO, NJTRST, 
 *                      TRACED, TRACECK.
 *     @arg GPIO_AF_1:  OUT, TIM2, TIM15, TIM16, TIM17.
 *     @arg GPIO_AF_2:  COMP1_OUT, TIM1, TIM2, TIM3, TIM4, TIM8, TIM15.
 *     @arg GPIO_AF_3:  COMP7_OUT, TIM8, TIM15, Touch.
 *     @arg GPIO_AF_4:  I2C1, I2C2, TIM1, TIM8, TIM16, TIM17.
 *     @arg GPIO_AF_5:  IR_OUT, I2S2, I2S3, SPI1, SPI2, TIM8, USART4, USART5
 *     @arg GPIO_AF_6:  IR_OUT, I2S2, I2S3, SPI2, SPI3, TIM1, TIM8
 *     @arg GPIO_AF_7:  AOP2_OUT, CAN, COMP3_OUT, COMP5_OUT, COMP6_OUT, USART1, 
 *                      USART2, USART3.
 *     @arg GPIO_AF_8:  COMP1_OUT, COMP2_OUT, COMP3_OUT, COMP4_OUT, COMP5_OUT, 
 *                      COMP6_OUT.
 *     @arg GPIO_AF_9:  AOP4_OUT, CAN, TIM1, TIM8, TIM15.
 *     @arg GPIO_AF_10: AOP1_OUT, AOP3_OUT, TIM2, TIM3, TIM4, TIM8, TIM17. 
 *     @arg GPIO_AF_11: TIM1, TIM8.
 *     @arg GPIO_AF_12: TIM1.
 *     @arg GPIO_AF_14: USBDM, USBDP.
 *     @arg GPIO_AF_15: OUT.             
 * @note  The pin should already been configured in Alternate Function mode(AF)
 *        using GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF
 * @note  Refer to the Alternate function mapping table in the device datasheet 
 *        for the detailed mapping of the system and peripherals alternate 
 *        function I/O pins.
 * @retval None
 */
void GPIO_PinAFConfig(GPIO_TypeDef* GPIOx, uint16_t GPIO_PinSource,
		uint8_t GPIO_AF) {
	uint32_t temp = 0x00;
	uint32_t temp_2 = 0x00;

	/* Check the parameters */
	assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
	assert_param(IS_GPIO_PIN_SOURCE(GPIO_PinSource));
	assert_param(IS_GPIO_AF(GPIO_AF));

	temp = ((uint32_t) (GPIO_AF)
			<< ((uint32_t) ((uint32_t) GPIO_PinSource & (uint32_t) 0x07) * 4));
	GPIOx->AFR[GPIO_PinSource >> 0x03] &= ~((uint32_t) 0xF
			<< ((uint32_t) ((uint32_t) GPIO_PinSource & (uint32_t) 0x07) * 4));
	temp_2 = GPIOx->AFR[GPIO_PinSource >> 0x03] | temp;
	GPIOx->AFR[GPIO_PinSource >> 0x03] = temp_2;
}

/**
 * @}
 */

/**
 * @}
 */

/**
 * @}
 */

/**
 * @}
 */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
